Compare 40/18 and 25/21
1st number: 2 4/18, 2nd number: 1 4/21
40/18 is greater than 25/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
40/18 = 40 × 7/18 × 7 = 280/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
25/21 = 25 × 6/21 × 6 = 150/126 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 280/126 > 150/126 or 40/18 > 25/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18 and 25/21 40/18 and 50/21 40/36 and 25/21 40/18 and 25/42 40/18 and 75/21 40/54 and 25/21 40/18 and 25/63 40/90 and 25/21